Mastering A2P Registration: A Step-by-Step Guide

How to verify SMS communication for your company.

A2P registration can feel like a daunting task. But here’s the thing: If you’re using HighLevel to engage with customers via SMS, this isn’t just another checkbox to tick. It’s a game-changer.


Let’s dive in.

Why A2P Registration Matters

If you’ve been sending bulk or automated SMS messages without A2P registration, you’re taking a big risk.


And not just with your campaigns, but with your brand’s credibility.


Carriers are cracking down on spammy messages, and if you don’t register, there’s a good chance your messages will be blocked or flagged.


A2P registration ensures your SMS campaigns go smoothly, that your messages don’t get caught in spam filters, and that your customers get the timely communications they signed up for.


For businesses using HighLevel to send out reminders, promotions, or customer service messages, A2P isn’t just something you should consider—it’s a must.


Preparing the Documentation

Before you start registering, gather the necessary documents. Please note importance of the CP 575 Notice, which you’ll need to verify your business with the IRS.


Here are a few tips to get it right the first time:

  • Match your business info exactly: Any slight mismatch between what you enter in the registration and what’s on your CP 575 Notice can cause a rejection.
  • Get your website, privacy policies, and opt-in forms ready: Make sure your website is functional, and your opt-ins are in line with SMS regulations. These small details can save you a ton of trouble later.

Setting Up Your Business Profile

Next, you’ll head into the HighLevel Trust Center and start filling out your business profile. But don’t just rush through this step—every field matters. Small mistakes can mean delays or rejection. Here are the critical things to keep in mind:

  • Legal business name & address: Match these with your CP 575 Notice.
  • Authorized rep info: Use a personal phone number (not a Twilio number) for the authorized representative.
  • Business type: Is it an LLC? Sole proprietorship? Make sure you specify this correctly.

Website and Opt-In Compliance

Carriers care about one thing more than anything else: customer consent. If you want to send SMS messages to clients, you have to prove they opted in. Here are some essential tips to help you stay compliant:

  • Your website must be linked to a custom domain, not a HighLevel subdomain.
  • Include privacy policies and opt-in instructions on your site.
  • Be clear with opt-in forms—disclose message frequency, data rates, and opt-out instructions.

Submitting A2P Registration

Once you’ve got your profile, documentation, and website in order, you’re ready to submit your registration. This involves two critical tasks:

  • Brand verification: Confirm your business info and choose the right use case for your SMS campaigns (transactional or promotional).
  • Campaign verification: Provide detailed descriptions of your messages, and include real examples of the content you plan to send. Don’t forget to add opt-out instructions in every sample!

Troubleshooting Common Pitfalls

Even if you follow all the steps, issues can arise. Here are some common problems and how to handle them:

  • Rejection: Double-check your info for typos. If your opt-in flow isn’t clear, add more screenshots or explanations.
  • Invalid website: Make sure you’re using a custom domain and review your website for anything that might seem spammy.
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